Safe liquid seal system of rubber additive storage tank

Abstract

The utility model relates to a safe liquid seal system of a rubber additive storage tank, and belongs to the field of safety and environmental protection. The system comprises a heating liquid seal tank, a breather pipe, an air suction pipe, a water replenishing valve, a communicating pipe, a partition plate, an exhaust pipe, an overflow plate, a drain valve and a heating coil or a heating jacket. By the adoption of the system and method, the rubber auxiliary storage tank can be effectively sealed, tail gas is not exhausted, production operation is convenient, the environment is not polluted, and the system and method are simple in technological process, convenient to install and low in operation energy consumption.

Description

Technical Field

[0001] The utility model relates to the field of safety and environmental protection, in particular to a rubber additive storage tank safety liquid sealing system, which can be widely arranged in the process of industrial production. Background Art

[0002] Rubber additives (such as 6PPD, IPPD, RT base, TMQ, etc., with a freezing point of 25℃~95℃) are general-purpose excellent rubber additives for natural rubber, synthetic rubber and latex. They have protective properties against ozone and flex cracking, and are also excellent antioxidants against heat, oxygen, light, and general aging. They are often used in the manufacture of products that withstand high dynamic and static stresses, such as aircraft and automobile tires, bicycle tires, cables, hoses, tapes, rubber rollers and other industrial rubber products.

[0003] At present, the storage tanks for liquid rubber additives in production all adopt open atmospheric pressure storage tanks, that is, there are vents on the top of the storage tank that are directly connected to the atmosphere. Due to the in and out of liquid, the heating intensity in the storage tank, the change of external environment temperature and other reasons, the gas phase space and pressure in the storage tank will change, causing the gas to escape or be inhaled. This "breathing" phenomenon will cause the emission of polluting gases into the atmosphere to pollute the environment, and may also cause air to be inhaled into the storage tank, causing the gas and liquid that cannot be exposed to air to be contaminated and deteriorate or form an explosive and dangerous environment.

[0004] Since the rubber additive vapor has the phenomenon of condensation, it often causes the single call valve and breathing valve to be blocked and malfunction, so it is not suitable to use the single call valve and breathing valve sealing system.

[0005] Therefore, in order to avoid the above situation and reduce the contact between the gas and liquid in the storage tank and the outside world, it is urgent to take effective restriction and protection measures for the existing open atmospheric pressure storage tanks. Utility Model Content

[0006] The purpose of the utility model is to provide a rubber additive solution storage tank safety liquid sealing system, which is to add nitrogen sealing and safety liquid sealing system to the rubber additive open atmospheric pressure storage tank. When the rubber additive storage tank needs to inhale, nitrogen is immediately filled in to achieve nitrogen sealing; when the rubber additive storage tank needs to exhale, the exhaled rubber additive tail gas is safely treated in the safety liquid sealing system.

[0007] By adopting the above system, the rubber additive storage tank can be nitrogen-sealed and the tail gas can be safely treated. It is a rubber additive storage tank safety liquid sealing system with short process, small footprint, low investment and low energy consumption. This patent aims to protect the environment and prevent the rubber additives from being contaminated and deteriorated or forming an explosive and dangerous environment.

[0008] The purpose of this patent can be achieved through the following technical solutions:

[0009] A rubber additive storage tank safety liquid sealing system, the safety liquid sealing system comprises a heating liquid sealing tank, a vent pipe, an air intake pipe, a water supply valve, a connecting pipe, a partition plate, an exhaust pipe, an overflow plate, a drain valve, a heating coil, and a heating jacket. The system comprises a rubber additive storage tank, the output end of the top of the rubber additive storage tank is connected to the top of the safety liquid sealing system, the heating liquid sealing tank comprises a cylindrical barrel, the middle of which is divided into an upper and lower chamber by a horizontally installed partition plate, and the two chambers are connected by a connecting pipe vertically passing through the partition plate.

[0010] In the above system: the liquid level of the upper chamber of the heating liquid sealing tank is controlled by the height of the E port on the top of the connecting pipe, a vent pipe is provided at the vent port A above the liquid level of the upper chamber, a suction pipe is provided at the suction port B and the lowest point D of the suction pipe is located below the liquid level, a process hot water inlet G is provided with a process hot water pipeline from the boundary area and a water replenishment valve is provided on the process hot water pipeline; a drain valve is installed at the cleaning port L below the liquid level of the upper chamber, the drain valve is connected to the tank cleaning liquid pipeline to the boundary area, and the cleaning port L is arranged as close to the partition plate as possible.

[0011] In the above system: the liquid level of the lower chamber of the heating liquid seal tank is controlled by the height of the upper end of the overflow plate, and an exhaust pipe is provided at the exhaust port H above the liquid level of the lower chamber; a cleaning port K is provided at the bottom of the heating liquid seal tank below the liquid level of the lower chamber, and a drain valve is installed vertically at the cleaning port K. An overflow liquid port J is provided below the overflow liquid level of the lower chamber, and the overflow liquid port J is connected to the overflow liquid pipeline of the delimited area.

[0012] In the above system: the outside of the heating liquid seal tank is provided with a heating coil or a heating jacket, the heat source inlet is the M and P ports, and the heat source outlet is the N and Q ports.

[0013] In the above system: the height from the bottom F port of the connecting pipe to the upper end of the overflow plate is less than the height from the top E port of the connecting pipe to the inlet C of the suction pipe.

[0014] In some more specific technical solutions, the sealed nitrogen pipeline from the boundary area is connected to the inlet B at the top of the rubber additive storage tank through a nitrogen self-operated regulating valve, and the port D at the top of the rubber additive storage tank is connected to the vent A of the heating liquid seal tank through a vent pipe.

[0015] Furthermore: the rubber additive pipeline from the boundary zone is connected to the inlet A at the top of the rubber additive storage tank, the pressure relief manhole is installed at the port C at the top of the rubber additive storage tank, the outlet E at the lower side of the rubber additive storage tank is connected to the rubber additive pipeline to the boundary zone through a rubber additive delivery pump, and a heater is provided at the bottom of the rubber additive storage tank, the heat source inlet F of the heater is connected to the heat source pipeline from the boundary zone, and the heat source outlet G of the heater is connected to the heat source pipeline to the boundary zone.

[0016] Further: the liquid level of the upper chamber of the heating liquid seal tank is controlled by the height of the connecting pipe top E port, the vent A above the liquid level of the upper chamber is provided with a vent pipe, the air intake port B is provided with an air intake pipe and the lowest point D of the air intake pipe is located below the liquid level, the process hot water inlet G is provided with a process hot water pipeline from the boundary area and the process hot water pipeline is provided with a water replenishment valve; a drain valve is installed at the cleaning port L below the liquid level of the upper chamber, the drain valve is connected to the tank cleaning liquid pipeline to the boundary area, and the cleaning port L is arranged as close to the partition plate as possible.

[0017] Further: the liquid level of the lower chamber of the heating liquid seal tank is controlled by the height of the upper end of the overflow plate, and an exhaust pipe is provided at the exhaust port H above the liquid level of the lower chamber; a cleaning port K is provided at the bottom of the heating liquid seal tank below the liquid level of the lower chamber, and a drain valve is vertically installed at the cleaning port K. An overflow liquid port J is provided below the overflow liquid level of the lower chamber, and the overflow liquid port J is connected to the overflow liquid pipeline of the deboundary area.

[0018] Further: the outside of the heating liquid seal tank is provided with a heating coil or a heating jacket, the heat source inlet is the M and P ports connected to the heat source pipeline from the boundary area, and the heat source outlet is the N and Q ports connected to the heat source pipeline to the boundary area.

[0019] Furthermore: the heat source pipelines are all equipped with insulation layers. Depending on the type of rubber additives, the heat source can be steam or hot water; all pipelines containing rubber additives are insulated with jacketed pipes.

[0020] Furthermore: the height a from the bottom F port of the connecting pipe to the upper end of the overflow plate is less than the height b from the top E port of the connecting pipe to the inlet C of the suction pipe, 400≥a≥0; the height from the outlet D of the suction pipe to the top E of the connecting pipe is c, 200≥c≥0.

[0021] A method for realizing nitrogen sealing of a rubber additive storage tank and safe treatment of tail gas using the above system comprises the following steps:

[0022] (1) Normal pressure-boosting operation of the rubber additive storage tank: When the rubber additive from the boundary area enters the rubber additive storage tank from the inlet A at the top of the rubber additive storage tank or the heating intensity of the heater is too high and the external environment temperature rises, the gas phase pressure in the rubber additive storage tank rises. When the pressure in the rubber additive storage tank is higher than the atmospheric pressure and the pressure difference is greater than the set a value liquid column, the escaping gas enters the heated liquid seal tank from the D port at the top of the rubber additive storage tank through the vent pipe and the vent A. The rubber additive in the escaping gas remains in the liquid phase; the non-condensable gas in the escaping gas enters the lower chamber from the upper chamber through the connecting pipe, and is discharged into the atmosphere from the exhaust port H through the exhaust pipe after being washed with liquid.

[0023] (2) Normal pressure reduction operation of rubber additive storage tank: When the rubber additive in the rubber additive storage tank is discharged from the lower side outlet E to the boundary area through the rubber additive delivery pump or the heating intensity of the heater is too low and the external environment temperature decreases, the gas phase pressure in the rubber additive storage tank decreases. When the pressure in the rubber additive storage tank is lower than the set value, the nitrogen self-operated regulating valve opens, and the nitrogen from the boundary area enters the rubber additive storage tank from the inlet B at the top of the rubber additive storage tank through the nitrogen self-operated regulating valve. The rubber additive storage tank is pressurized while avoiding contact between the rubber additive and the air. When the nitrogen sealing device fails or the nitrogen self-operated regulating valve is slow to act, the gas in the upper chamber enters the rubber additive storage tank from the vent A through the vent pipe through the D port at the top of the rubber additive storage tank; when the pressure in the upper chamber is lower than the atmospheric pressure and the pressure difference is greater than the set c value liquid column, the outdoor air will enter the upper chamber through the suction pipe from the lowest point D port of the suction pipe.

[0024] (3) Abnormal operation of the rubber additive storage tank: When the pressure in the rubber additive storage tank rises suddenly and rapidly, for safety reasons, in addition to the normal pressure-increasing operation of the rubber additive storage tank in step (1), when the critical pressure is reached, the pressure relief manhole will be opened in time to relieve the pressure. When the pressure in the rubber additive storage tank drops suddenly and rapidly, for safety reasons, the nitrogen sealing device and the safety liquid sealing system in step (2) will be started simultaneously.

[0025] (4) Operation of the safe liquid seal system: The solidification point of rubber additives is high. Depending on the type of rubber additives, hot water or steam is passed through the heating coil or heating jacket of the heating liquid seal tank, and the temperature of the heating liquid seal tank is maintained at 35°C to 98°C. The liquid level in the heating liquid seal tank is controlled by the water supply valve, connecting pipe and overflow plate. If the liquid level is too low, open the water supply valve to add hot water. If the liquid level in the upper chamber is too high, it will be discharged into the lower chamber through the connecting pipe. If the liquid level in the lower chamber is too high, it will be discharged through the overflow plate and overflow liquid port J. The liquid in the heating liquid seal tank is regularly discharged through the drain valve and the rubber additive in the liquid is recovered.

[0026] Beneficial effects of the present invention:

[0027] When the rubber additive storage tank is fed with material or the heating intensity of the heater is too large, or the external environment temperature rises, the gas phase pressure in the rubber additive storage tank rises. When the pressure in the rubber additive storage tank is higher than the set value, the escaping gas enters the safety liquid seal system. The rubber additive in the escaping gas remains in the liquid phase, and the non-condensable gas in the escaping gas enters the lower chamber from the upper chamber through the connecting pipe, and is discharged into the atmosphere from the exhaust pipe after being washed with liquid.

[0028] When the rubber additive storage tank is discharged or the heating intensity of the heater is too low or the external environment temperature decreases, the gas phase pressure in the rubber additive storage tank decreases. When the pressure in the rubber additive storage tank is lower than the set value, the nitrogen from the boundary area enters the rubber additive storage tank, and the rubber additive storage tank is pressurized while avoiding the contact between the rubber additive and the air. When the nitrogen sealing device fails or the nitrogen self-acting regulating valve moves slowly, the gas in the upper chamber enters the rubber additive storage tank.

[0029] When the pressure in the rubber additive storage tank suddenly rises rapidly and reaches the critical pressure, the pressure relief manhole will open in time to relieve the pressure. When the pressure in the rubber additive storage tank suddenly drops rapidly, the nitrogen sealing device and the safety liquid sealing system will start at the same time.

[0030] Rubber additives have a high melting point. Depending on the type of rubber additives, hot water or steam is passed through the heating coil or heating jacket of the heating liquid seal tank. The liquid level in the heating liquid seal tank is controlled by the water supply valve, connecting pipe and overflow plate. If the liquid level is too low, open the water supply valve to add hot water. If the liquid level in the upper chamber is too high, it will be discharged into the lower chamber through the connecting pipe. If the liquid level in the lower chamber is too high, it will be discharged through the overflow plate and overflow liquid port J. The liquid in the heating liquid seal tank is regularly discharged through the drain valve and the rubber additives in the liquid are recovered.

[0031] The above system and method is a safe and environmentally friendly system and method for nitrogen sealing and tail gas safety treatment of rubber additive storage tanks, which can be used to nitrogen seal rubber additive storage tanks and safely treat tail gas, and has a short process, small footprint, low investment, and low energy consumption. This patent aims to protect the environment and prevent rubber additives from being contaminated and deteriorated or forming an explosive and dangerous environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a diagram of the coil heating safety liquid seal system of the utility model.

[0033] Figure 2 This is a diagram of the jacket heating safety liquid sealing system of the utility model.

[0034] Figure 3 This is a schematic diagram of the coil heating process of the utility model.

[0035] Figure 4 This is a schematic diagram of the jacket heating process flow of the utility model.

[0036] Among them, there are a rubber additive storage tank 1, a nitrogen self-operated regulating valve 1-1, a pressure relief manhole 1-2, a heater 1-3, a rubber additive delivery pump 2, a safety liquid seal system 3, a heating liquid seal tank 3-1, a vent pipe 3-2, an air intake pipe 3-3, a water supply valve 3-4, a connecting pipe 3-5, a partition plate 3-6, an exhaust pipe 3-7, an overflow plate 3-8, a drain valve 3-9, a heating coil 3-10, and a heating jacket 3-11. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present patent to clearly and completely describe the technical solutions in the embodiments of the present patent. Obviously, the described embodiments are part of the embodiments of the present patent, not all of the embodiments. The components of the embodiments of the present patent described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present patent provided in the drawings is not intended to limit the scope of the patent claimed for protection, but only represents the selected embodiments of the present patent. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent. The embodiments of the present patent are described in detail below, and examples of the embodiments are shown in the drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below by reference to the drawings are exemplary and are intended to be used to explain the present patent, and cannot be understood as limitations on the present patent.

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] like Figure 1 , Figure 2 , Figure 3 , Figure 4 A safety liquid sealing system for a rubber additive storage tank, the safety liquid sealing system 3 comprises a heating liquid sealing tank 3-1, a vent pipe 3-2, an air intake pipe 3-3, a water supply valve 3-4, a connecting pipe 3-5, a partition plate 3-6, an exhaust pipe 3-7, an overflow plate 3-8, a drain valve 3-9, a heating coil 3-10, and a heating jacket 3-11. The heating liquid sealing tank 3-1 comprises a cylindrical barrel, and a horizontally installed partition plate 3-6 in the middle divides the heating liquid sealing tank 3-1 into an upper chamber and a lower chamber, and the two chambers are connected by a connecting pipe 3-5 vertically passing through the partition plate 3-6.

[0040] The liquid level of the upper chamber of the heating liquid sealing tank 3-1 is controlled by the height of the top E port of the connecting pipe 3-5, and the vent A above the liquid level of the upper chamber is provided with a vent pipe 3-2, the suction port B is provided with a suction pipe 3-3 and the lowest point D of the suction pipe 3-3 is located below the liquid level, the process hot water inlet G is provided with a process hot water pipeline from the boundary area and the process hot water pipeline is provided with a water replenishment valve 3-4; the cleaning port L below the liquid level of the upper chamber is installed with a drain valve 3-9, the drain valve 3-9 is connected to the tank cleaning liquid pipeline to the boundary area, and the cleaning port L is set as close to the partition plate 3-6 as possible.

[0041] The liquid level of the lower chamber of the heating liquid sealing tank 3-1 is controlled by the height of the upper end of the overflow plate 3-8. The exhaust port H above the liquid level of the lower chamber is provided with an exhaust pipe 3-7; the bottom of the heating liquid sealing tank 3-1 below the liquid level of the lower chamber is provided with a cleaning port K, and a drain valve 3-9 is vertically installed at the cleaning port K. An overflow liquid port J is provided below the overflow liquid level of the lower chamber, and the overflow liquid port J is connected to the overflow liquid pipeline of the delimited area.

[0042] The heating liquid seal tank 3-1 is provided with a heating coil 3-10 or a heating jacket 3-11 on the outside, the heat source inlet is M, P port, and the heat source outlet is N, Q port.

[0043] The height from the bottom F port of the connecting pipe 3-5 to the upper end of the overflow plate 3-8 is smaller than the height from the top E port of the connecting pipe 3-5 to the inlet C of the suction pipe 3-3.

[0044] The sealed nitrogen pipeline from the boundary area is connected to the inlet B at the top of the rubber chemical storage tank 1 through the nitrogen self-operated regulating valve 1-1, and the port D at the top of the rubber chemical storage tank 1 is connected to the vent A of the heating liquid sealing tank 3-1 through the vent pipe 3-2.

[0045] The rubber additive pipeline from the boundary zone is connected to the inlet A at the top of the rubber additive storage tank 1. The pressure relief manhole 1-2 is installed at the port C at the top of the rubber additive storage tank 1. The outlet E at the lower side of the rubber additive storage tank 1 is connected to the rubber additive pipeline to the boundary zone through a rubber additive delivery pump 2. The bottom of the rubber additive storage tank 1 is provided with a heater 1-3. The heat source inlet F of the heater 1-3 is connected to the heat source pipeline from the boundary zone, and the heat source outlet G of the heater 1-3 is connected to the heat source pipeline to the boundary zone.

[0046] The liquid level of the upper chamber of the heating liquid sealing tank 3-1 is controlled by the height of the top E port of the connecting pipe 3-5, and the vent A above the liquid level of the upper chamber is provided with a vent pipe 3-2, the suction port B is provided with a suction pipe 3-3 and the lowest point D of the suction pipe 3-3 is located below the liquid level, the process hot water inlet G is provided with a process hot water pipeline from the boundary area and the process hot water pipeline is provided with a water replenishment valve 3-4; the cleaning port L below the liquid level of the upper chamber is installed with a drain valve 3-9, the drain valve 3-9 is connected to the tank cleaning liquid pipeline to the boundary area, and the cleaning port L is set as close to the partition plate 3-6 as possible.

[0047] The liquid level of the lower chamber of the heating liquid sealing tank 3-1 is controlled by the height of the upper end of the overflow plate 3-8. The exhaust port H above the liquid level of the lower chamber is provided with an exhaust pipe 3-7; the bottom of the heating liquid sealing tank 3-1 below the liquid level of the lower chamber is provided with a cleaning port K, and a drain valve 3-9 is vertically installed at the cleaning port K. An overflow liquid port J is provided below the overflow liquid level of the lower chamber, and the overflow liquid port J is connected to the overflow liquid pipeline of the delimited area.

[0048] The heating liquid seal tank 3-1 is provided with a heating coil 3-10 or a heating jacket 3-11 on the outside. The heat source inlet is M and P ports connected to the heat source pipeline from the boundary area, and the heat source outlet is N and Q ports connected to the heat source pipeline outside the boundary area.

[0049] The heat source pipes are all equipped with insulation layers. Depending on the type of rubber additives, the heat source can be steam or hot water. All pipes containing rubber additives are insulated with jacketed pipes.

[0050] The height a from the bottom F port of the connecting pipe 3-5 to the upper end of the overflow plate 3-8 is less than the height b from the top E port of the connecting pipe 3-5 to the inlet C of the suction pipe 3-3, 400≥a≥0; the height from the outlet D of the suction pipe 3-3 to the top E of the connecting pipe 3-5 is c, 200≥c≥0.

[0051] The method for realizing nitrogen sealing of the rubber additive storage tank and safe treatment of tail gas by using the above system comprises the following steps. More than one rubber additive can be selected. Now, 6PPD is used as Example 1:

[0052] (1) Normal pressure-increasing operation of the rubber chemical storage tank: When the rubber chemical from the boundary zone enters the rubber chemical storage tank 1 from the inlet A at the top of the rubber chemical storage tank 1 or the heating intensity of the heater 1-3 is too large and the external environment temperature rises, the gas phase pressure in the rubber chemical storage tank 1 rises. When the pressure in the rubber chemical storage tank 1 is higher than the atmospheric pressure and the pressure difference is greater than the set value a=100mm liquid column, the escaping gas enters the heating liquid seal tank 3-1 from the D port at the top of the rubber chemical storage tank 1 through the vent pipe 3-2 and the vent A. The rubber chemical in the escaping gas remains in the liquid phase; the non-condensable gas in the escaping gas enters the lower chamber from the upper chamber through the connecting pipe 3-5, and is discharged into the atmosphere from the exhaust port H through the exhaust pipe 3-7 after being washed with liquid.

[0053] (2) Normal pressure reduction operation of rubber additive storage tank: When the rubber additive in the rubber additive storage tank 1 is discharged from the lower side outlet E to the boundary area through the rubber additive delivery pump 2 or the heating intensity of the heater 1-3 is too low and the external environment temperature decreases, the gas phase pressure in the rubber additive storage tank 1 decreases. When the pressure in the rubber additive storage tank 1 is lower than the set value of 0.1KPa (G), the nitrogen self-operated regulating valve 1-1 opens, and the nitrogen from the boundary area enters the rubber additive storage tank 1 from the inlet B at the top of the rubber additive storage tank 1 through the nitrogen self-operated regulating valve 1-1, and the rubber additive storage tank 1 is pressurized while avoiding contact between the rubber additive and the air; when the pressure in the rubber additive storage tank 1 reaches 0.5KPa (G), the nitrogen self-operated regulating valve 1-1 is closed and the nitrogen intake is stopped. When the nitrogen sealing device fails to open or the nitrogen self-operated regulating valve 1-1 moves slowly, the gas in the upper chamber enters the rubber additive storage tank 1 from the vent A through the vent pipe 3-2 and the top D port of the rubber additive storage tank 1; when the pressure in the upper chamber is lower than the atmospheric pressure and the pressure difference is greater than the set value c=50mm liquid column, the outdoor air will enter the upper chamber from the lowest point D port of the suction pipe through the suction pipe 3-3.

[0054] (3) Abnormal operation of the rubber chemical storage tank: When the pressure in the rubber chemical storage tank 1 suddenly rises rapidly, for safety reasons, in addition to the normal pressure-increasing operation of the rubber chemical storage tank in step (1), when the critical pressure reaches 5KPa (G), the pressure relief manhole 1-2 will be opened in time to relieve the pressure. When the pressure in the rubber chemical storage tank 1 suddenly drops rapidly, for safety reasons, the nitrogen sealing device and the safety liquid sealing system 3 in step (2) will be started simultaneously.

[0055] (4) Operation of the safety liquid seal system: The melting point of rubber additive 6PPD is ≥45℃, and hot water (temperature 60℃~70℃) is passed through the heating coil 3-10 or the heating jacket 3-11 of the heating liquid seal tank 3-1, and the temperature of the heating liquid seal tank is maintained at 60℃~70℃. The liquid level in the heating liquid seal tank 3-1 is controlled by the water replenishment valve 3-4, the connecting pipe 3-5 and the overflow plate 3-8. If the liquid level is too low, open the water replenishment valve 3-4 to add hot water (temperature 60℃~70℃). If the liquid level in the upper chamber is too high, it is discharged into the lower chamber through the connecting pipe 3-5. If the liquid level in the lower chamber is too high, it is discharged through the overflow plate 3-8 and the overflow liquid port J. The liquid in the heating liquid seal tank 3-1 is regularly discharged through the drain valve 3-9 and the rubber additive 6PPD in the liquid is recovered.

[0056] Now take TMQ as Example 2:

[0057] The first three steps of the method for realizing nitrogen sealing of the rubber additive storage tank and safe treatment of tail gas by using the above system are the same as those in Example 1.

[0058] (4) Operation of the safety liquid seal system: The melting point of rubber additive TMQ is ≥72℃, and steam (temperature 110℃, pressure 150KPa) is passed through the heating coil 3-10 or the heating jacket 3-11 of the heating liquid seal tank 3-1, and the temperature of the heating liquid seal tank is maintained at 80℃~95℃. The liquid level in the heating liquid seal tank 3-1 is controlled by the water replenishment valve 3-4, the connecting pipe 3-5 and the overflow plate 3-8. If the liquid level is too low, open the water replenishment valve 3-4 to add hot water (temperature 80℃~95℃). If the liquid level in the upper chamber is too high, it is discharged into the lower chamber through the connecting pipe 3-5. If the liquid level in the lower chamber is too high, it is discharged through the overflow plate 3-8 and the overflow liquid port J. The liquid in the heating liquid seal tank 3-1 is regularly discharged through the drain valve 3-9 and the rubber additive TMQ in the liquid is recovered.

[0059] The operating parameters of the patent example are shown in Table 1

[0060] Table 1 Example operation parameters

[0061] Table 1 Example operation parameters

[0062]

[0063]

Claims

1. A rubber additive storage tank safety liquid sealing system, characterized by: The system comprises a rubber additive storage tank (1), the output end of the top of the rubber additive storage tank (1) is connected to the top of a safety liquid seal system (3), the safety liquid seal system (3) comprises a heating liquid seal tank (3-1), the heating liquid seal tank (3-1) is a cylindrical barrel, and a horizontally installed partition plate (3-6) in the middle divides the heating liquid seal tank (3-1) into an upper chamber and a lower chamber, and the two chambers are connected by a connecting pipe (3-5) vertically passing through the partition plate (3-6).

2. The rubber additive storage tank safety liquid sealing system according to claim 1, characterized in that: A vent port A above the liquid level of the upper chamber is provided with a vent pipe (3-2), an air intake port B is provided with an air intake pipe (3-3), and the lowest point D of the air intake pipe (3-3) is located below the liquid level; The process hot water inlet G is provided with a process hot water pipeline from the boundary area and a water supply valve (3-4) is provided on the process hot water pipeline; A drain valve (3-9) is installed at the cleaning port L below the liquid level of the upper chamber. The drain valve (3-9) is connected to a tank cleaning liquid pipeline of the demarcation area. The cleaning port L is arranged close to the partition plate (3-6).

3. The rubber additive storage tank safety liquid sealing system according to claim 1 is characterized in that: The lower chamber of the heating liquid sealing tank (3-1) is provided with an overflow plate (3-8), and the exhaust port H above the liquid level of the lower chamber is provided with an exhaust pipe (3-7); A cleaning port K is provided at the bottom of the heating liquid sealing tank (3-1), and a drain valve (3-9) is installed vertically at the cleaning port K; an overflow liquid port J is provided below the overflow liquid level of the lower chamber, and the overflow liquid port J is connected to the overflow liquid pipeline of the delimited area.

4. The rubber additive storage tank safety liquid sealing system according to claim 1, characterized in that: The heating liquid sealing tank (3-1) is provided with a heating coil (3-10) or a heating jacket (3-11) on the outside.

5. The rubber additive storage tank safety liquid sealing system according to claim 3 is characterized by: The height from the bottom port F of the connecting pipe (3-5) to the upper end of the overflow plate (3-8) is less than the height from the top port E of the connecting pipe (3-5) to the inlet C of the suction pipe (3-3).

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